Figure 3From: Turbulent flow as a cause for underestimating coronary flow reserve measured by Doppler guide wireMaximum value of the average peak velocity APV in 43 patients before (○) or after an angiographically successful angioplasty of 32 patients (●). The highest values of APV were taken for each individual. The flow velocity at the critical Reynolds number (CRN) 500 describes the change from laminar to turbulent flow profile.Back to article page